Hormonal dynamics during mate choice in the northern pintail: a test of the 'challenge' hypothesis
Article Abstract:
Research has confirmed the view that behavioural stimuli connected with successful pair formation lead to a temporary rise in circulating levels of corticosterone in male northern pintails, Anas acuta. This rise in turn determines the behavioural response of a rise in aggression leading to the establishment of dominance after a mate has been selected. It seems that hormonal mechanisms upon which aggressive behaviours are based may be more diverse than had previously been assumed. In certain social situations, corticosterone may play a more important role than testosterone in determining aggressive behaviour.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Avian reproductive timing: when should parents be prudent?
Article Abstract:
Reproductive windows are different in different birds. Single-brooded parent birds are supposed to be prudent and their decision to start breeding is based on many reliable cues, including their energy balance in contrast to multi-brooded parents. These are based on differing costs and benefits of early breeding. A study of 16 species reveals that multi-brooded birds advance their dates of laying to a large extent following food provisioning than the double and single-brooded birds. This advancement is largely due to the strong responses and long breeding season of the multi-brooded birds.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1995
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Divorce in birds: a review of the hypotheses
Article Abstract:
The causes behind the divorce in monogamous birds are yet to be comprehended in spite of the study on avian mating system. Many hypotheses are put forth to understand why and when individuals may divorce but they are yet to be properly organized theoretically and empirically. There are confusions about the assumptions and predictions of the individual models due to the absence of substantial theoretical framework. Further progress in the area needs sound mathematical modelling of the hypotheses.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1995
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